html 5 tutorial chapter 9 form attributes. new form attributes html5 has several new elements and...
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HTML 5 TutorialHTML 5 Tutorial
Chapter 9Chapter 9Form AttributesForm Attributes
New Form AttributesNew Form Attributes• HTML5 has several new elements and attributes for forms.
New form attributes :• autocomplete• novalidate
• New input attributes :• autocomplete• autofocus• form• form overrides (formaction, formenctype, formmethod, formnovalidate,
formtarget)• height and width• list• min, max and step• multiple• pattern (regexp)• placeholder• required
Browser SupportBrowser Support• Browser support for the new input type :
Input Type IE Firefox Opera Chrome Safariautocomplete 8.0 3.5 9.5 3.0 4.0
autofocus No 4.0 10.0 3.0 4.0
form No 4.0 9.5 10.0 No
form overrides No 4.0 10.5 10.0 No
height and width 8.0 3.5 9.5 3.0 4.0
list No 4.0 9.5 No No
min, max and step No No 9.5 3.0 No
multiple No 3.5 11.0 3.0 4.0
novalidate No 4.0 11.0 10.0 No
pattern No 4.0 9.5 3.0 No
placeholder No 4.0 11.0 3.0 3.0
required No 4.0 9.5 3.0 No
autocomplete Attributeautocomplete Attribute• The autocomplete attribute specifies that the form or input field
should have an autocomplete function.• Note: The autocomplete attribute works with <form>, and the
following <input> types: text, search, url, telephone, email, password, datepickers, range, and color.
• When the user starts to type in an autocomplete field, the browser should display options to fill in the field :
<form action="demo_form.asp" method="get" autocomplete="on">First name: <input type="text" name="fname" /><br />Last name: <input type="text" name="lname" /><br />E-mail: <input type="email" name="email" autocomplete="off" /><br /><input type="submit" /></form>
• In some browsers you may need to activate the autocomplete function for this to work.
autofocus Attributeautofocus Attribute• The autofocus attribute specifies that a field should automatically get
focus when a page is loaded.• Note: The autofocus attribute works with all <input> types.
User name: <input type="text" name="user_name" autofocus="autofocus" />
form Attributeform Attribute• The form attribute specifies one or more forms the input field belongs
to.• Note: The form attribute works with all <input> types.• To refer to more than one form, use a space-separated list. • The form attribute must refer to the id of the form it belongs to:
<form action="demo_form.asp" method="get" id="user_form">First name:<input type="text" name="fname" /><input type="submit" /></form>Last name: <input type="text" name="lname" form="user_form" />
Form Override AttributeForm Override Attribute• The form override attributes allow you to override some of the
attributes set for the form element.• The form override attributes are :• formaction - Overrides the form action attribute• formenctype - Overrides the form enctype attribute• formmethod - Overrides the form method attribute• formnovalidate - Overrides the form novalidate attribute• formtarget - Overrides the form target attribute
• Note: The form override attributes works with the following <input> types: submit and image.
Form Override AttributeForm Override Attribute• Example :
<form action="demo_form.asp" method="get" id="user_form">E-mail: <input type="email" name="userid" /><br /><input type="submit" value="Submit" /><br /><input type="submit" formaction="demo_admin.asp" value="Submit as admin" /><br /><input type="submit" formnovalidate="true"value="Submit without validation" /><br /></form>
• These attributes are helpful for creating different submit buttons.
height and width Attributeheight and width Attribute• The height and width attributes specifies the height and
width of the image used for the input type image.• The height and width attributes only works with <input>
type: image.
<input type="image" src="img_submit.gif" width="24" height="24" />
list Attributelist Attribute• The list attribute specifies a datalist for an input field. A
datalist is a list of options for an input field.• The list attribute works with the following <input> types :
text, search, url, telephone, email, date pickers, number, range, and color.
Webpage: <input type="url" list="url_list" name="link" /><datalist id="url_list"><option label="W3Schools" value="http://www.w3schools.com" /><option label="Google" value="http://www.google.com" /><option label="Microsoft" value="http://www.microsoft.com" /></datalist>
min, max and step Attributemin, max and step Attribute• The min, max and step attributes are used to specify
restrictions for input types containing numbers or dates.• The max attribute specifies the maximum value allowed for
the input field.• The min attribute specifies the minimum value allowed for
the input field.• The step attribute specifies the legal number intervals for
the input field (if step="3", legal numbers could be -3,0,3,6, etc).
min, max and step Attributemin, max and step Attribute• The min, max, and step attributes works with the following
<input> types: date pickers, number, and range.• The example below shows a numeric field that accepts
values between 0 and 10, with a step of 3 (legal numbers are 0, 3, 6 and 9):
Points: <input type="number" name="points" min="0" max="10" step="3" />
multiplemultiple AttributeAttribute• The multiple attribute specifies that multiple values can be
selected for an input field.• The multiple attribute works with the following <input>
types: email, and file.• Example :
Select images: <input type="file" name="img" multiple="multiple" />
novalidate Attributenovalidate Attribute• The novalidate attribute specifies that the form or input
field should not be validated when submitted.• If this attribute is present the form will not validate form
input.• The novalidate attribute works with: <form> and the
following <input> types: text, search, url, telephone, email, password, date pickers, range, and color.
• Example :
<form action="demo_form.asp" novalidate="novalidate">E-mail: <input type="email" name="user_email" /><input type="submit" /></form>
pattern Attributepattern Attribute• The pattern attribute specifies a pattern used to validate an
input field.• The pattern is a regular expression. • The pattern attribute works with the following <input>
types: text, search, url, telephone, email, and password• The example below shows a text field that can only contain
three letters (no numbers or special characters) :
Country code: <input type="text" name="country_code"pattern="[A-z]{3}" title="Three letter country code" />
placeholderplaceholder AttributeAttribute• The placeholder attribute provides a hint that describes the
expected value of an input field.• The placeholder attribute works with the following <input>
types: text, search, url, telephone, email, and password• The hint is displayed in the input field when it is empty, and
disappears when the field gets focus.• Example :
<input type="search" name="user_search" placeholder="Search W3Schools" />
required Attributerequired Attribute• The required attribute specifies that an input field must be
filled out before submitting.• The required attribute works with the following <input>
types: text, search, url, telephone, email, password, date pickers, number, checkbox, radio, and file.
• Example :
Name: <input type="text" name="usr_name" required="required" />
ReferenceReference
1. Hickson, I. (Eds.). (2011). HTML Living Standar. Retrieved from http://www.whatwg.org/specs/web-apps/current-work/multipage/
2. World Wide Web Consortium. (n.d.). HTML 5 Tutorial. Retrieved from http://www.w3schools.com/html5/default.asp